Hi Douglas,
Hmmm... how about swapping the order of arguments?
e.g)
if __name__ == "__main__":
manager.main(args=['ryu.app.ofctl_rest'] + sys.argv)
FYI, I guess Dr.Bernstein did "hack"(used "ryu.cmd.manager" directly) in order
to
add original CLI option like "--netfile" and "--widest_paths".
On the other hand, you can add your original CLI option as following.
$ git diff
diff --git a/ryu/flags.py b/ryu/flags.py
index 69eb3d2..ebf16c8 100644
--- a/ryu/flags.py
+++ b/ryu/flags.py
@@ -112,3 +112,10 @@ CONF.register_cli_opts([
help='Initial Router ID used by Zebra protocol service '
'(default: %s)' % DEFAULT_ZSERV_ROUTER_ID),
], group='zapi')
+
+CONF.register_cli_opts([
+ cfg.StrOpt(
+ 'netfile', default=None, help='network json file'),
+ cfg.BoolOpt(
+ 'widest_paths', default=False, help='Use widest path.'),
+])
Please note you need to re-install Ryu after the above modifications.
$ python setup.py install
Then, with this modification, you can run "l2DestForwardStaticRyu.py" as the
standard Ryu application via "ryu-manager":
$ ryu-manager --help
...(snip)...
--netfile NETFILE network json file
...(snip)...
--widest_paths Use widest path.
...(snip)...
$ ryu-manager l2DestForwardStaticRyu.py ryu.app.ofctl_rest
--netfile=ExNetwithLoops1A.json --widest_paths
Thanks,
Iwase
On 2017年06月13日 22:04, Douglas Harewood-Gill wrote:
> Hi Iwase and thank you for getting back to me. The author of this program, Dr
> Bernstein added this line "from ryu.cmd import manager" which as far as I
> understand directly starts Ryu from within side L2DestForwardStaticRyu.py.
> Should be around line 29 I think. He had to do this he told me because he
> could not start the program in the conventional way because he needed to
> import the "ExNetwithLoops!A.json file" for the topology with static mac and
> IP addresses. Apparently he could not do this just using the standard Ryu
> format of starting the Ryu Manager with the Controller file and then with
> REST.
>
> I tried your suggestion by removing "manager.main(args=sys.argv)"
>
> from " if __name__ == "__main__": "
>
> and using the following:-
>
> "manager.main(args=sys.argv + ['ryu.app.ofctl_rest'])" and I got the
> following error message in the terminal.
>
> "l2DestForwardStaticRyuNS: error: unrecognized arguments: ryu.app.ofctl_rest"
>
> Any advice would be welcome. I am obviously going to see what I can find here
> and will let you know if I find anything relevant.
>
> Cheers
>
> Douglas
>
>
>
>
> On 13 June 2017 at 02:17, Iwase Yusuke <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi Douglas,
>
> I checked "L2DestForwardStaticRyu.py", and it seems to be "hacked" to run
> app without "ryu-manager".
> To start the built-in Ryu application with "L2DestForwardStaticRyu.py",
> how about the following?
> The following appends to "ofctl_rest" app to the argument of "manager".
>
> e.g.) around line 91:
>
> if __name__ == "__main__":
> - manager.main(args=sys.argv)
> + manager.main(args=sys.argv + ['ryu.app.ofctl_rest'])
>
>
> Thanks,
> Iwase
>
>
> On 2017年06月09日 21:00, Douglas Harewood-Gill wrote:
> > Hi Iwase. Thank you for contacting me and apologies for my delay in
> responding. I have tried what you have suggested but the problem I have is
> that the L2DestForwardStaticRyu.py program is designed to run on its own. It
> imports the the ryu.cmd import manager and uses the Ryu controller but you
> start it by typing "|python l2DestForwardStaticRyu.py
> --netfile=ExNetwithLoops1A.json" |where it imports =ExNetWithLoops1A.Json.
> > When this program is started, it automatically loads Ryu and implements
> the code within this program. I am not sure how to start the this and
> ryu.app.ofctl_rest at the same time. I have tried starting them separately in
> different terminals but that did not work.
> >
> > Thank you also for the information you have sent. I have looked at it
> before but I do not know how to implement this with my custom code. I have
> been looking for examples but they seem to be few and far between. Any advice
> as always would be greatly appreciated.
> >
> > Thanks again.
> >
> > Douglas
> >
> > On 8 June 2017 at 01:27, Iwase Yusuke <[email protected]
> <mailto:[email protected]> <mailto:[email protected]
> <mailto:[email protected]>>> wrote:
> >
> > Hi Douglas,
> >
> > Excuse me for cutting in.
> >
> > Just for getting flow statistics, how about running your app and
> ofctl_rest
> > together as Fujimoto said.
> > e.g.)
> > $ ryu-manager your_app.py ryu.app.ofctl_rest
> >
> >
> > If you want to implement your own REST APIs on your app, Ryu-Book
> is the
> > most helpful as far as I know.
> > (You might already be aware of this though...)
> > http://osrg.github.io/ryu-book/en/html/rest_api.html
> <http://osrg.github.io/ryu-book/en/html/rest_api.html>
> <http://osrg.github.io/ryu-book/en/html/rest_api.html
> <http://osrg.github.io/ryu-book/en/html/rest_api.html>>
> >
> >
> > FYI, here is an sample implementation on simple_switch_13.py for
> getting
> > flow statistics.
> > The usage of "WSGI" framework is described on Ryu-Book.
> >
> >
> > $ git diff
> > diff --git a/ryu/app/simple_switch_13.py
> b/ryu/app/simple_switch_13.py
> > index 3e7c598..f33e474 100644
> > --- a/ryu/app/simple_switch_13.py
> > +++ b/ryu/app/simple_switch_13.py
> > @@ -13,6 +13,8 @@
> > # See the License for the specific language governing permissions
> and
> > # limitations under the License.
> >
> > +import json
> > +
> > from ryu.base import app_manager
> > from ryu.controller import ofp_event
> > from ryu.controller.handler import CONFIG_DISPATCHER,
> MAIN_DISPATCHER
> > @@ -21,14 +23,26 @@ from ryu.ofproto import ofproto_v1_3
> > from ryu.lib.packet import packet
> > from ryu.lib.packet import ethernet
> > from ryu.lib.packet import ether_types
> > +from ryu.app.ofctl import api as ofctl_api
> > +from ryu.app.wsgi import ControllerBase
> > +from ryu.app.wsgi import Response
> > +from ryu.app.wsgi import route
> > +from ryu.app.wsgi import WSGIApplication
> > +
> > +
> > +_URI_PREFIX = '/simpleswitch/stats/{dpid}'
> >
> >
> > class SimpleSwitch13(app_manager.RyuApp):
> > OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
> > + _CONTEXTS = {'wsgi': WSGIApplication}
> >
> > def __init__(self, *args, **kwargs):
> > super(SimpleSwitch13, self).__init__(*args, **kwargs)
> > self.mac_to_port = {}
> > + wsgi = kwargs['wsgi']
> > + wsgi.register(SimpleSwitchController,
> > + {SimpleSwitch13.__name__: self})
> >
> > @set_ev_cls(ofp_event.EventOFPSwitchFeatures,
> CONFIG_DISPATCHER)
> > def switch_features_handler(self, ev):
> > @@ -117,3 +131,32 @@ class SimpleSwitch13(app_manager.RyuApp):
> > out = parser.OFPPacketOut(datapath=datapath,
> buffer_id=msg.buffer_id,
> > in_port=in_port,
> actions=actions, data=data)
> > datapath.send_msg(out)
> > +
> > + def get_flow_stats(self, dpid):
> > + datapath = ofctl_api.get_datapath(self, dpid)
> > + if datapath is None:
> > + return None
> > +
> > + parser = datapath.ofproto_parser
> > + req = parser.OFPFlowStatsRequest(datapath)
> > +
> > + rep = ofctl_api.send_msg(
> > + app=self, msg=req,
> > + reply_cls=parser.OFPFlowStatsReply, reply_multi=True)
> > + return [r.to_jsondict() for r in rep]
> > +
> > +
> > +class SimpleSwitchController(ControllerBase):
> > +
> > + def __init__(self, req, link, data, **config):
> > + super(SimpleSwitchController, self).__init__(req, link,
> data, **config)
> > + self.simple_switch_app = data[SimpleSwitch13.__name__]
> > +
> > + @route('simpleswitch', _URI_PREFIX, methods=['GET'])
> > + def list_mac_table(self, req, **kwargs):
> > + dpid = int(str(kwargs['dpid']))
> > + ret = self.simple_switch_app.get_flow_stats(dpid)
> > + if ret is None:
> > + return Response(status=404)
> > +
> > + return Response(content_type='application/json',
> body=json.dumps(ret))
> >
> >
> > $ ryu-manager ryu/app/simple_switch_13.py
> > Registered VCS backend: git
> > Registered VCS backend: hg
> > Registered VCS backend: svn
> > Registered VCS backend: bzr
> > loading app ryu/app/simple_switch_13.py
> > loading app ryu.controller.ofp_handler
> > loading app ryu.app.ofctl.service
> > loading app ryu.controller.ofp_handler
> > creating context wsgi
> > instantiating app ryu.app.ofctl.service of OfctlService
> > instantiating app ryu/app/simple_switch_13.py of SimpleSwitch13
> > instantiating app ryu.controller.ofp_handler of OFPHandler
> > (10332) wsgi starting up on http://0.0.0.0:8080
> > ...
> >
> >
> > $ curl -X GET http://localhost:8080/simpleswitch/stats/1
> <http://localhost:8080/simpleswitch/stats/1>
> <http://localhost:8080/simpleswitch/stats/1
> <http://localhost:8080/simpleswitch/stats/1>> | python -m json.tool
> > [
> > {
> > "OFPFlowStatsReply": {
> > "body": [
> > {
> > "OFPFlowStats": {
> > "byte_count": 140,
> > "cookie": 0,
> > "duration_nsec": 771000000,
> > "duration_sec": 1,
> > "flags": 0,
> > "hard_timeout": 0,
> > "idle_timeout": 0,
> > "instructions": [
> > {
> > "OFPInstructionActions": {
> > "actions": [
> > {
> > "OFPActionOutput": {
> > "len": 16,
> > "max_len": 65535,
> > "port": 4294967293,
> > "type": 0
> > }
> > }
> > ],
> > "len": 24,
> > "type": 4
> > }
> > }
> > ],
> > "length": 80,
> > "match": {
> > "OFPMatch": {
> > "length": 4,
> > "oxm_fields": [],
> > "type": 1
> > }
> > },
> > "packet_count": 2,
> > "priority": 0,
> > "table_id": 0
> > }
> > }
> > ],
> > "flags": 0,
> > "type": 1
> > }
> > }
> > ]
> >
> >
> > Thanks,
> > Iwase
> >
> >
> > On 2017年06月07日 20:21, Douglas Harewood-Gill wrote:
> > > Hi there. That is fantastic. Sounds exactly like what I am
> looking for so thank you.
> > >
> > > One last question for the minute. I know you provided a link but
> how do you implement this with custom Ryu controller code?
> > >
> > > My apologies if I am asking something really obvious.
> > >
> > > Cheers
> > >
> > > Douglas
> > >
> > > On 7 June 2017 at 01:15, Fujimoto Satoshi
> <[email protected] <mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>
> <mailto:[email protected] <mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>>>
> wrote:
> > >
> > > Hi, Douglas
> > >
> > > Ryu has ofctl_rest.py, which is a sample application and
> provides REST API to get flow statistics.
> > >
> http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html>
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html>>
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html>
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html
> <http://ryu.readthedocs.io/en/latest/app/ofctl_rest.html>>>
> > >
> > > I think it is better to use ofctl_rest.py than to implement
> your own REST API in your app.
> > >
> > > Thanks,
> > > Fujimoto
> > >
> > >
> > > On 2017年06月06日 21:18, Douglas Harewood-Gill wrote:
> > >>
> > >> Greetings I am a PhD student new to both Python and Ryu and
> I was wondering if anyone could give me some advice.
> > >>
> > >>
> > >> I am using the Ryu controller program
> (L2DestForwardStaticRyu.py) provided by Dr Grey Bernstein
> (https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu>
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu>>
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu>
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu
> <https://www.grotto-networking.com/SDNfun.html#programming-switches-with-ryu>>>)
> for shortest path computation for a full Mesh network in Mininet but the
> example provided does not include REST which I require to be able to collect
> flow statistics such as the flows in each router, bandwidth, latency, etc.
> > >>
> > >>
> > >> Unfortunately I have been looking and with the exception of
> (https://osrg.github.io/ryu-book/en/html/rest_api.html
> <https://osrg.github.io/ryu-book/en/html/rest_api.html>
> <https://osrg.github.io/ryu-book/en/html/rest_api.html
> <https://osrg.github.io/ryu-book/en/html/rest_api.html>>
> <https://osrg.github.io/ryu-book/en/html/rest_api.html
> <https://osrg.github.io/ryu-book/en/html/rest_api.html>
> <https://osrg.github.io/ryu-book/en/html/rest_api.html
> <https://osrg.github.io/ryu-book/en/html/rest_api.html>>>) which seems overly
> specific, I am unable to find a good example that would allow me to work out
> how to integrate REST into the above Ryu control program.
> > >>
> > >> So if anyone can point me in the right direction or can
> provide some examples, I would be most grateful.
> > >>
> > >>
> > >> Thank you for your time.
> > >>
> > >>
> > >> Best Regards
> > >>
> > >>
> > >> Douglas
> > >>
> > >>
> > >>
> > >> --
> > >> *Douglas Harewood-Gill MSc MIET*
> > >> CDT Student in Communications (PhD), University of Bristol
> > >> Post-Graduate Student (Taught and Research)
> > >> e-mail: [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> <mailto:[email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>>
> > >>
> > >> *
> > >> CDT Communications*
> > >>
> > >> University of Bristol, Merchant Venturers' Building,
> Woodland Road, Clifton, Bristol. BS8 1UB
> > >>
> > >> http://www.bristol.ac.uk/
> > >>
> > >>
> > >>
> > >>
> > >>
> ------------------------------------------------------------------------------
> > >> Check out the vibrant tech community on one of the world's
> most
> > >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > >>
> > >>
> > >> _______________________________________________
> > >> Ryu-devel mailing list
> > >> [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> <mailto:[email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>>
> > >> https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>>
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>>>
> > >
> > >
> > >
> > >
> > > --
> > > *Douglas Harewood-Gill MSc MIET*
> > > CDT Student in Communications (PhD), University of Bristol
> > > Post-Graduate Student (Taught and Research)
> > > e-mail: [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> <mailto:[email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>>
> > >
> > > *
> > > CDT Communications*
> > >
> > > University of Bristol, Merchant Venturers' Building, Woodland
> Road, Clifton, Bristol. BS8 1UB
> > >
> > > http://www.bristol.ac.uk/
> > >
> > >
> > >
> > >
> > >
> ------------------------------------------------------------------------------
> > > Check out the vibrant tech community on one of the world's most
> > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > >
> > >
> > >
> > > _______________________________________________
> > > Ryu-devel mailing list
> > > [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> > > https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>>
> > >
> >
> >
> >
> >
> > --
> > *Douglas Harewood-Gill MSc MIET*
> > CDT Student in Communications (PhD), University of Bristol
> > Post-Graduate Student (Taught and Research)
> > e-mail: [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> >
> > *
> > CDT Communications*
> >
> > University of Bristol, Merchant Venturers' Building, Woodland Road,
> Clifton, Bristol. BS8 1UB
> >
> > http://www.bristol.ac.uk/
> >
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> >
> >
> >
> > _______________________________________________
> > Ryu-devel mailing list
> > [email protected] <mailto:[email protected]>
> > https://lists.sourceforge.net/lists/listinfo/ryu-devel
> <https://lists.sourceforge.net/lists/listinfo/ryu-devel>
> >
>
>
>
>
> --
> *Douglas Harewood-Gill MSc MIET*
> CDT Student in Communications (PhD), University of Bristol
> Post-Graduate Student (Taught and Research)
> e-mail: [email protected]
> <mailto:[email protected]>
>
> *
> CDT Communications*
>
> University of Bristol, Merchant Venturers' Building, Woodland Road, Clifton,
> Bristol. BS8 1UB
>
> http://www.bristol.ac.uk/
>
>
>
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>
>
>
> _______________________________________________
> Ryu-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/ryu-devel
>
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